If your entrance door is already equipped with a suitable mortise lock, a safe enough cylinder and perhaps you have alredy installed a rim lock and / or a cross bar, do not forget about the fitting protecting the mortise and cylinder locks.

Security fittings provide additional protection and are primarily to be used on the entrance door of a building. For indoor use, normally it is enough to have a shield or handle without a steel insert.

There are long and short fittings, ones with handle, knob, or without these as rosettes only.